Which of the following is the reason for existence of vestigial structures (useless parts of the body)?
a. They must have functioned in the near past.
b. They must have functioned in ancestral organisms.
c. They must have functioned in other organisms.
d. They must have functioned in similar organisms.
Ans: b. They must have functioned in ancestral organisms.
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Which statement most accurately compares the recovery from fire in the mesquite community to that of the prairie dog community? a. The prairie dog community experienced a temporary disturbance and quick recovery, while themesquite community experienced a change in community structure
b. The prairie dog community experienced a change in community structure, while the mesquitecommunity experienced a temporary disturbance and quick recovery. c. Both communities experienced a quick recovery following a fire. d. Both communities experienced comparable, quick recovery following a fire.
The tube-like structures extending from these
bacterial cells to the underlying cells in the above figure are used for a. attachment. b. locomotion. c. whipping up proteins. d. breathing. e. communication.
The swelling, itching, and redness associated with injury to a tissue are known as ________
Fill in the blank(s) with correct word
Which one of the following would have the greatest genetic diversity?
A. an organism B. a population C. a species D. All could have similar genetic diversity.